I would like to change my first and last name. I would like to know some things. Such as

What is the procedure here in Finland?
What is the cost?
What will I need to do for all things here in Finland (e.g Bank, the degree certificates in Finland, my national ID card/passport)?
What will happen to my names in the birth certificate, educational certificates that I have got in my home country?

I would like to change my first and last name. I would like to know some things. Such as

What is the procedure here in Finland?
What is the cost?
What will I need to do for all things here in Finland (e.g Bank, the degree certificates in Finland, my national ID card/passport)?
What will happen to my names in the birth certificate, educational certificates that I have got in my home country?